Improvement in mixers and heaters for preparing concrete for pavements



HENRY FRANKE.

improvement in Mixter and Heater for preparing Concrete fer Pavement. No. 121,351. Patented Nov. 23,1831.

UNITED STATES PATENT OFFICE.

HENRY FRANKE, OF BROOKLYN, NEW YORK.

IMPRDVEMENT IN MIXERS AND HEATERS FFI4 PREPARING CONCRETE FR PAVEMENTS, &c.

Specification forming part of Letters Patent No. 121,351, dated November 28, 1871.

To all whom 'it may comcm.r

Be it known that I, HENRY FRANKE, of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Mixer and Heater for Concrete and other materials; and I do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification, in which drawing- Figure l represents a longitudinal vertical section of this invention. Fig. 2 is a transverse vertical section of the same. Fig. 3 is a rear view of the same.

Similar letters indicate corresponding parts.

This invention consists in a mixingdrum, on the ends of which are mounted suitable wheels, and which is provided with a draft-pole, thill, or push-handle, connected to it in such a manner that when the apparatus is drawn or pushed along the contents of the drum are intimately mixed; and by'the semeans an apparatus is obtained in which mortar or cement or other materials for building, for paving streets, or for other purposes, can be mixed while said materials are in transit from the yard to the place where they are to be used, thus saving much time and labor.

With the mixing-drum are combined a heating-jacket and a furnace, so that the materials to be mixed can be heated during the time of mixing and kept hot, if desirable, until they are to be used.

The furnace is attached to the heatingjacket by means of slides, and it is supported by a spring or springs, so that when the apparatus is drawn over a rough or rugged surface the re is not materially disturbed by the jar of the apparatus.

In the drawing, A designates a drum, made of boiler-iron or other suitable material, and supported by wheels B B, which are mounted on its ends, so that by drawing or pushing the same along on the ground the drum is caused to revolve.- The ends of said drum are closed by doors a, through which the materials to be mixed are introduced and removed; and from the inner surface of the drum rise ribs or iianges b, either spiral or parallel with the axis of the drum, so that as the drum revolves the materials contained therein are carried up and then dumped, and thereby the operation of mixing said materials is facilitated. Through the heads of the mixing-drum extends an axle, C, and on the ends of this axle swings loosely the draft-pole or pushhandle D, so that by means of this pole or handle the apparatus can be conveniently carried or pushed along on the ground, causing the drum to revolve. The wheels B B may be provided with projections c on their faces to prevent them from slipping on the ground, and also to increase the shaking motion imparted to the material to be mixed when the apparatus is drawn along. In using my apparatus in a city where the streets are roughly paved the projections c can be omitted. The mixing-drum A is surrounded by a jacket, E, which is connected to the draft-pole D, in front and rear, by standards (l and crossbar e, or by any other suitable means, so that it is held in a concentric position to the drum, while it does not revolve with. the same. With this jacket is connected a furnace, F, and from said jacket rises a smoke-stack, G, through which the products of combustion escape. rIhe furnace is provided with flanges f, which slide in guides g attached to the jacket, and said furnace is suspended from rods h, which pass through sockets in the rear cross-bar e, (see Fig. 3,) and rest upon springs or the furnace may be suspended from one or more springs in any other desirable manner. By the action of these springs the furnace is relieved from the shocks or jars of the apparatus when the same is drawn over rough or uneven ground, and the fire remains in good condition.

My apparatus is particularly intended for mix ing concrete which is generally made of sand and asphaltum,with or without calcareous substances; and by introducing these materials into the mixing-drum in the yard and starting a re in the furnace the concrete is mixed while the apparatus is drawn from the yard to the place where said concrete is to be laid, and at the same time the mixture can be readily kept at the proper temperature. My apparatus may, however, be also used with advantage for mixing mortar or other materials which are mixed cold; and in this case the heatingjacket and furnace can be dispensed with.

What I claim as new, and desire to secure by Letters Patent, is-

l. The mixing-drum A having mounted ou its springs, in combination With the jacket E, drum ends the Wheels B B7 and loeing` connected to 2L A, Wheels B B, and pole or handle D, subst-an draft-pole or puslrhandle7 substantially as und tiully as set forth. for the purpose described. HENRY FRANKE.

2. The heating-jacket E, in combination With the mixing-drum A, Wheels B B, and pole or Witnesses: handle D7 substantially as set fort-l1. W. HAUFF,

3. The furnace F suspended from one or more E. F. KASTENHUBER. (110) 

